[Word Smart] N, O

nebulous: (especially of ideas) not clear and having no form, 불분명한, 명백하지 않은
nemesis: 극복하기 어려운 상대나 경쟁자
neophyte: someone who has recently become involved in an activity and is still learning about it, 초보자
nirvana: a state of freedom from all suffering, 더없이 행복하고 걱정없는 상태
noisome: very unpleasant and offensive, 불쾌한
nomenclature: a system for naming things, especially in a particular area of science, 명칭 체계
nonchalant: 무관심한, 무심한
nullify: to cause something to have no value or effect, 무효로 하다, 취소하다

obeisance: 존경, 인사, 절
objective: 공평한
obtrusive: too noticeable, (보기 싫게) 눈에 띄는
obviate: to remove a difficulty, 제거하다, 무용지물로 만들다
occult: 초자연적인
odious: extremely unpleasant and causing or deserving hate, 사악한
olfactory: connected with the ability to smell, 후각에 관련된
oligarchy: government by a small group of very powerful people
ominous: suggesting that something unpleasant is likely to happen, 불길한
omniscient: having or seeming to have unlimited knowledge, 모든 것을 다 아는
opprobrious: expressing severe criticism and blame, 비난하는
ordinance: a law or rule made by a government or authority, 법령, 규칙
oscillate: to move repeatedly from one position to another, 진동하다, 앞뒤로 흔들리다
osmosis: 삼투, (접촉을 통해) 서서히 터득함
ostracize: to avoid someone intentionally, 배척하다
oust: to force someone to leave a position of power, job, place, or competition, 추방하다
override: 기각하다, ~보다 뛰어나다
oxymoron: 모순어법
overture: a communication made to someone in order to offer something, 제의